Support for ingest namespacing

Move content status to list statuses and add single status
to interface.
Updates API to support list statuses and status
Updates snapshot key creation to be generic

Signed-off-by: Derek McGowan <derek@mcgstyle.net>

api/services/content/v1/content.pb.go

@@ -20,6 +20,8 @@
 		Status
 		StatusRequest
 		StatusResponse
+		ListStatusesRequest
+		ListStatusesResponse
 		WriteContentRequest
 		WriteContentResponse
 		AbortRequest
@@ -195,7 +197,7 @@ func (*Status) ProtoMessage()               {}
 func (*Status) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{8} }
 
 type StatusRequest struct {
-	Filter string `protobuf:"bytes,1,opt,name=filter,proto3" json:"filter,omitempty"`
+	Ref string `protobuf:"bytes,1,opt,name=ref,proto3" json:"ref,omitempty"`
 }
 
 func (m *StatusRequest) Reset()                    { *m = StatusRequest{} }
@@ -203,13 +205,29 @@ func (*StatusRequest) ProtoMessage()               {}
 func (*StatusRequest) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{9} }
 
 type StatusResponse struct {
-	Statuses []Status `protobuf:"bytes,1,rep,name=statuses" json:"statuses"`
+	Status *Status `protobuf:"bytes,1,opt,name=status" json:"status,omitempty"`
 }
 
 func (m *StatusResponse) Reset()                    { *m = StatusResponse{} }
 func (*StatusResponse) ProtoMessage()               {}
 func (*StatusResponse) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{10} }
 
+type ListStatusesRequest struct {
+	Filter string `protobuf:"bytes,1,opt,name=filter,proto3" json:"filter,omitempty"`
+}
+
+func (m *ListStatusesRequest) Reset()                    { *m = ListStatusesRequest{} }
+func (*ListStatusesRequest) ProtoMessage()               {}
+func (*ListStatusesRequest) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{11} }
+
+type ListStatusesResponse struct {
+	Statuses []Status `protobuf:"bytes,1,rep,name=statuses" json:"statuses"`
+}
+
+func (m *ListStatusesResponse) Reset()                    { *m = ListStatusesResponse{} }
+func (*ListStatusesResponse) ProtoMessage()               {}
+func (*ListStatusesResponse) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{12} }
+
 // WriteContentRequest writes data to the request ref at offset.
 type WriteContentRequest struct {
 	// Action sets the behavior of the write.
@@ -265,7 +283,7 @@ type WriteContentRequest struct {
 
 func (m *WriteContentRequest) Reset()                    { *m = WriteContentRequest{} }
 func (*WriteContentRequest) ProtoMessage()               {}
-func (*WriteContentRequest) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{11} }
+func (*WriteContentRequest) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{13} }
 
 // WriteContentResponse is returned on the culmination of a write call.
 type WriteContentResponse struct {
@@ -299,7 +317,7 @@ type WriteContentResponse struct {
 
 func (m *WriteContentResponse) Reset()                    { *m = WriteContentResponse{} }
 func (*WriteContentResponse) ProtoMessage()               {}
-func (*WriteContentResponse) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{12} }
+func (*WriteContentResponse) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{14} }
 
 type AbortRequest struct {
 	Ref string `protobuf:"bytes,1,opt,name=ref,proto3" json:"ref,omitempty"`
@@ -307,7 +325,7 @@ type AbortRequest struct {
 
 func (m *AbortRequest) Reset()                    { *m = AbortRequest{} }
 func (*AbortRequest) ProtoMessage()               {}
-func (*AbortRequest) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{13} }
+func (*AbortRequest) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{15} }
 
 func init() {
 	proto.RegisterType((*Info)(nil), "containerd.services.content.v1.Info")
@@ -321,6 +339,8 @@ func init() {
 	proto.RegisterType((*Status)(nil), "containerd.services.content.v1.Status")
 	proto.RegisterType((*StatusRequest)(nil), "containerd.services.content.v1.StatusRequest")
 	proto.RegisterType((*StatusResponse)(nil), "containerd.services.content.v1.StatusResponse")
+	proto.RegisterType((*ListStatusesRequest)(nil), "containerd.services.content.v1.ListStatusesRequest")
+	proto.RegisterType((*ListStatusesResponse)(nil), "containerd.services.content.v1.ListStatusesResponse")
 	proto.RegisterType((*WriteContentRequest)(nil), "containerd.services.content.v1.WriteContentRequest")
 	proto.RegisterType((*WriteContentResponse)(nil), "containerd.services.content.v1.WriteContentResponse")
 	proto.RegisterType((*AbortRequest)(nil), "containerd.services.content.v1.AbortRequest")
@@ -356,13 +376,15 @@ type ContentClient interface {
 	//
 	// The requested data may be returned in one or more messages.
 	Read(ctx context.Context, in *ReadContentRequest, opts ...grpc.CallOption) (Content_ReadClient, error)
-	// Status returns the status of ongoing object ingestions, started via
+	// Status returns the status for a single reference.
+	Status(ctx context.Context, in *StatusRequest, opts ...grpc.CallOption) (*StatusResponse, error)
+	// ListStatuses returns the status of ongoing object ingestions, started via
 	// Write.
 	//
 	// Only those matching the regular expression will be provided in the
 	// response. If the provided regular expression is empty, all ingestions
 	// will be provided.
-	Status(ctx context.Context, in *StatusRequest, opts ...grpc.CallOption) (*StatusResponse, error)
+	ListStatuses(ctx context.Context, in *ListStatusesRequest, opts ...grpc.CallOption) (*ListStatusesResponse, error)
 	// Write begins or resumes writes to a resource identified by a unique ref.
 	// Only one active stream may exist at a time for each ref.
 	//
@@ -484,6 +506,15 @@ func (c *contentClient) Status(ctx context.Context, in *StatusRequest, opts ...g
 	return out, nil
 }
 
+func (c *contentClient) ListStatuses(ctx context.Context, in *ListStatusesRequest, opts ...grpc.CallOption) (*ListStatusesResponse, error) {
+	out := new(ListStatusesResponse)
+	err := grpc.Invoke(ctx, "/containerd.services.content.v1.Content/ListStatuses", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *contentClient) Write(ctx context.Context, opts ...grpc.CallOption) (Content_WriteClient, error) {
 	stream, err := grpc.NewClientStream(ctx, &_Content_serviceDesc.Streams[2], c.cc, "/containerd.services.content.v1.Content/Write", opts...)
 	if err != nil {
@@ -545,13 +576,15 @@ type ContentServer interface {
 	//
 	// The requested data may be returned in one or more messages.
 	Read(*ReadContentRequest, Content_ReadServer) error
-	// Status returns the status of ongoing object ingestions, started via
+	// Status returns the status for a single reference.
+	Status(context.Context, *StatusRequest) (*StatusResponse, error)
+	// ListStatuses returns the status of ongoing object ingestions, started via
 	// Write.
 	//
 	// Only those matching the regular expression will be provided in the
 	// response. If the provided regular expression is empty, all ingestions
 	// will be provided.
-	Status(context.Context, *StatusRequest) (*StatusResponse, error)
+	ListStatuses(context.Context, *ListStatusesRequest) (*ListStatusesResponse, error)
 	// Write begins or resumes writes to a resource identified by a unique ref.
 	// Only one active stream may exist at a time for each ref.
 	//
@@ -674,6 +707,24 @@ func _Content_Status_Handler(srv interface{}, ctx context.Context, dec func(inte
 	return interceptor(ctx, in, info, handler)
 }
 
+func _Content_ListStatuses_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ListStatusesRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ContentServer).ListStatuses(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/containerd.services.content.v1.Content/ListStatuses",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ContentServer).ListStatuses(ctx, req.(*ListStatusesRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _Content_Write_Handler(srv interface{}, stream grpc.ServerStream) error {
 	return srv.(ContentServer).Write(&contentWriteServer{stream})
 }
@@ -734,6 +785,10 @@ var _Content_serviceDesc = grpc.ServiceDesc{
 			MethodName: "Status",
 			Handler:    _Content_Status_Handler,
 		},
+		{
+			MethodName: "ListStatuses",
+			Handler:    _Content_ListStatuses_Handler,
+		},
 		{
 			MethodName: "Abort",
 			Handler:    _Content_Abort_Handler,
@@ -1053,11 +1108,11 @@ func (m *StatusRequest) MarshalTo(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
-	if len(m.Filter) > 0 {
+	if len(m.Ref) > 0 {
 		dAtA[i] = 0xa
 		i++
-		i = encodeVarintContent(dAtA, i, uint64(len(m.Filter)))
+		i = encodeVarintContent(dAtA, i, uint64(len(m.Ref)))
-		i += copy(dAtA[i:], m.Filter)
+		i += copy(dAtA[i:], m.Ref)
 	}
 	return i, nil
 }
@@ -1073,6 +1128,58 @@ func (m *StatusResponse) Marshal() (dAtA []byte, err error) {
 }
 
 func (m *StatusResponse) MarshalTo(dAtA []byte) (int, error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if m.Status != nil {
+		dAtA[i] = 0xa
+		i++
+		i = encodeVarintContent(dAtA, i, uint64(m.Status.Size()))
+		n5, err := m.Status.MarshalTo(dAtA[i:])
+		if err != nil {
+			return 0, err
+		}
+		i += n5
+	}
+	return i, nil
+}
+
+func (m *ListStatusesRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalTo(dAtA)
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *ListStatusesRequest) MarshalTo(dAtA []byte) (int, error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if len(m.Filter) > 0 {
+		dAtA[i] = 0xa
+		i++
+		i = encodeVarintContent(dAtA, i, uint64(len(m.Filter)))
+		i += copy(dAtA[i:], m.Filter)
+	}
+	return i, nil
+}
+
+func (m *ListStatusesResponse) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalTo(dAtA)
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *ListStatusesResponse) MarshalTo(dAtA []byte) (int, error) {
 	var i int
 	_ = i
 	var l int
@@ -1166,19 +1273,19 @@ func (m *WriteContentResponse) MarshalTo(dAtA []byte) (int, error) {
 	dAtA[i] = 0x12
 	i++
 	i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt)))
-	n5, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.StartedAt, dAtA[i:])
+	n6, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.StartedAt, dAtA[i:])
-	if err != nil {
-		return 0, err
-	}
-	i += n5
-	dAtA[i] = 0x1a
-	i++
-	i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)))
-	n6, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
 	i += n6
+	dAtA[i] = 0x1a
+	i++
+	i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)))
+	n7, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
+	if err != nil {
+		return 0, err
+	}
+	i += n7
 	if m.Offset != 0 {
 		dAtA[i] = 0x20
 		i++
@@ -1366,7 +1473,7 @@ func (m *Status) Size() (n int) {
 func (m *StatusRequest) Size() (n int) {
 	var l int
 	_ = l
-	l = len(m.Filter)
+	l = len(m.Ref)
 	if l > 0 {
 		n += 1 + l + sovContent(uint64(l))
 	}
@@ -1374,6 +1481,26 @@ func (m *StatusRequest) Size() (n int) {
 }
 
 func (m *StatusResponse) Size() (n int) {
+	var l int
+	_ = l
+	if m.Status != nil {
+		l = m.Status.Size()
+		n += 1 + l + sovContent(uint64(l))
+	}
+	return n
+}
+
+func (m *ListStatusesRequest) Size() (n int) {
+	var l int
+	_ = l
+	l = len(m.Filter)
+	if l > 0 {
+		n += 1 + l + sovContent(uint64(l))
+	}
+	return n
+}
+
+func (m *ListStatusesResponse) Size() (n int) {
 	var l int
 	_ = l
 	if len(m.Statuses) > 0 {
@@ -1562,7 +1689,7 @@ func (this *StatusRequest) String() string {
 		return "nil"
 	}
 	s := strings.Join([]string{`&StatusRequest{`,
-		`Filter:` + fmt.Sprintf("%v", this.Filter) + `,`,
+		`Ref:` + fmt.Sprintf("%v", this.Ref) + `,`,
 		`}`,
 	}, "")
 	return s
@@ -1572,6 +1699,26 @@ func (this *StatusResponse) String() string {
 		return "nil"
 	}
 	s := strings.Join([]string{`&StatusResponse{`,
+		`Status:` + strings.Replace(fmt.Sprintf("%v", this.Status), "Status", "Status", 1) + `,`,
+		`}`,
+	}, "")
+	return s
+}
+func (this *ListStatusesRequest) String() string {
+	if this == nil {
+		return "nil"
+	}
+	s := strings.Join([]string{`&ListStatusesRequest{`,
+		`Filter:` + fmt.Sprintf("%v", this.Filter) + `,`,
+		`}`,
+	}, "")
+	return s
+}
+func (this *ListStatusesResponse) String() string {
+	if this == nil {
+		return "nil"
+	}
+	s := strings.Join([]string{`&ListStatusesResponse{`,
 		`Statuses:` + strings.Replace(strings.Replace(fmt.Sprintf("%v", this.Statuses), "Status", "Status", 1), `&`, ``, 1) + `,`,
 		`}`,
 	}, "")
@@ -2576,7 +2723,7 @@ func (m *StatusRequest) Unmarshal(dAtA []byte) error {
 		switch fieldNum {
 		case 1:
 			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Filter", wireType)
+				return fmt.Errorf("proto: wrong wireType = %d for field Ref", wireType)
 			}
 			var stringLen uint64
 			for shift := uint(0); ; shift += 7 {
@@ -2601,7 +2748,7 @@ func (m *StatusRequest) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.Filter = string(dAtA[iNdEx:postIndex])
+			m.Ref = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
@@ -2653,6 +2800,168 @@ func (m *StatusResponse) Unmarshal(dAtA []byte) error {
 			return fmt.Errorf("proto: StatusResponse: illegal tag %d (wire type %d)", fieldNum, wire)
 		}
 		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Status", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowContent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthContent
+			}
+			postIndex := iNdEx + msglen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.Status == nil {
+				m.Status = &Status{}
+			}
+			if err := m.Status.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipContent(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthContent
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *ListStatusesRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowContent
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: ListStatusesRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: ListStatusesRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Filter", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowContent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthContent
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Filter = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipContent(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthContent
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *ListStatusesResponse) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowContent
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: ListStatusesResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: ListStatusesResponse: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
 		case 1:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Statuses", wireType)
@@ -3286,61 +3595,63 @@ func init() {
 }
 
 var fileDescriptorContent = []byte{
-	// 881 bytes of a gzipped FileDescriptorProto
+	// 925 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xb4, 0x56, 0x4f, 0x6f, 0xe3, 0x44,
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xb4, 0x57, 0x4f, 0x6f, 0xe3, 0x44,
-	0x14, 0xcf, 0x24, 0x8e, 0x69, 0x5f, 0xc2, 0x12, 0x26, 0xa1, 0x8a, 0x8c, 0x70, 0x82, 0x85, 0x20,
+	0x14, 0xcf, 0x24, 0x8e, 0x69, 0x5f, 0xc2, 0x12, 0x26, 0xa1, 0x8a, 0x8c, 0x70, 0xb2, 0x16, 0x42,
-	0xda, 0x65, 0x9d, 0x6e, 0xba, 0x37, 0x24, 0x44, 0x92, 0x5d, 0xa0, 0x88, 0x2e, 0x92, 0x37, 0xb0,
+	0xd5, 0x2e, 0x75, 0xba, 0x69, 0x6f, 0x48, 0x88, 0x24, 0xbb, 0x40, 0x11, 0x5d, 0x90, 0x37, 0xb0,
-	0xa2, 0x17, 0xe4, 0x24, 0x13, 0x63, 0x29, 0xf1, 0x78, 0xed, 0x49, 0x04, 0x9c, 0xb8, 0x20, 0xa1,
+	0x62, 0x2f, 0xe0, 0x24, 0x13, 0x63, 0x29, 0xf1, 0x78, 0xed, 0x49, 0xc4, 0x72, 0xe2, 0x82, 0x84,
-	0x8a, 0x03, 0x5f, 0xa0, 0x17, 0xe0, 0xce, 0x9d, 0x4f, 0xd0, 0x23, 0x47, 0xb4, 0x87, 0x96, 0xe6,
+	0x2a, 0x0e, 0x7c, 0x81, 0x5e, 0x80, 0x3b, 0x77, 0x3e, 0x41, 0x8f, 0x5c, 0x90, 0x10, 0x87, 0x5d,
-	0x83, 0x20, 0xe4, 0xf1, 0xd8, 0x71, 0x9a, 0x96, 0xfc, 0x69, 0x38, 0xe5, 0x79, 0xfc, 0x7e, 0xbf,
+	0x36, 0x1f, 0x04, 0x21, 0x8f, 0xc7, 0x8e, 0x93, 0xb4, 0xe4, 0x4f, 0xb3, 0xa7, 0xbe, 0x19, 0xbf,
-	0xf7, 0xef, 0x97, 0x79, 0x86, 0x0f, 0x2d, 0x9b, 0x7d, 0x3d, 0xee, 0xea, 0x3d, 0x3a, 0xaa, 0xf7,
+	0xdf, 0xfb, 0xfb, 0x7b, 0xf3, 0x52, 0x78, 0xdf, 0xb2, 0xd9, 0xd7, 0xa3, 0x8e, 0xde, 0xa5, 0xc3,
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-	0x2f, 0x69, 0x90, 0x9f, 0x32, 0x93, 0x8d, 0x7d, 0xdc, 0x06, 0xf0, 0x99, 0xe9, 0x09, 0x7d, 0xa2,
+	0x5c, 0xd6, 0x7e, 0x4e, 0x83, 0xfc, 0x80, 0x99, 0x6c, 0xe4, 0xe3, 0x16, 0x80, 0xcf, 0x4c, 0x4f,
-	0x35, 0xf4, 0xb9, 0x2b, 0x70, 0x4d, 0x16, 0x90, 0x8c, 0xdd, 0xbe, 0x29, 0x48, 0xd2, 0xeb, 0x90,
+	0xf0, 0x13, 0xad, 0xc1, 0xcf, 0x5d, 0x81, 0x6b, 0xb0, 0xc0, 0xc8, 0xc8, 0xed, 0x99, 0xc2, 0x48,
-	0x08, 0x5c, 0x93, 0xe1, 0x02, 0x64, 0x3c, 0x32, 0xe0, 0xa5, 0xee, 0x1a, 0x81, 0x99, 0x28, 0x49,
+	0x7a, 0x1d, 0x23, 0x02, 0xd7, 0x60, 0xb8, 0x00, 0x19, 0x8f, 0xf4, 0x79, 0xaa, 0xbb, 0x46, 0x20,
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+	0x26, 0x52, 0x92, 0x66, 0x52, 0x2a, 0x41, 0x96, 0x51, 0x66, 0x0e, 0xca, 0x59, 0x7e, 0x1d, 0x1e,
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-	0xac, 0x74, 0xfb, 0xce, 0x26, 0xe6, 0x9a, 0xbd, 0x56, 0xaa, 0x72, 0x42, 0xaa, 0x17, 0x69, 0x28,
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-	0x4d, 0xc6, 0x6d, 0xbc, 0xc8, 0xc2, 0x4b, 0x42, 0x06, 0xd8, 0x14, 0x1b, 0xfc, 0xde, 0x2a, 0x2b,
+	0xf5, 0xc9, 0xe9, 0xe9, 0x49, 0xbb, 0x90, 0x56, 0x5e, 0x3b, 0x3b, 0xaf, 0xbe, 0x9a, 0xd0, 0x68,
-	0x43, 0x94, 0xa6, 0xbc, 0xbb, 0x9a, 0xb3, 0x50, 0xd8, 0x73, 0x90, 0x82, 0x95, 0x85, 0x1b, 0xcb,
+	0xf1, 0xad, 0xab, 0x14, 0x7f, 0xf8, 0x45, 0x4d, 0xfd, 0xfe, 0xab, 0x9a, 0xf4, 0x5b, 0xff, 0x53,
-	0x50, 0x8b, 0xeb, 0x4e, 0x39, 0x58, 0x0b, 0x13, 0x06, 0xdc, 0x47, 0xf8, 0x0b, 0x90, 0xc3, 0x75,
+	0x86, 0x97, 0x04, 0x0d, 0xb0, 0x29, 0x7e, 0x42, 0xdc, 0x5e, 0x65, 0x67, 0x89, 0xd4, 0x94, 0xb7,
-	0x86, 0x1f, 0x2e, 0x23, 0xb8, 0x6e, 0xed, 0x29, 0x7b, 0x0b, 0xb2, 0x7b, 0x1c, 0x7c, 0xf6, 0x04,
+	0x57, 0x53, 0x16, 0x0c, 0x7b, 0x0c, 0x52, 0x30, 0xdd, 0xb8, 0xbe, 0x0c, 0xb5, 0xb8, 0x6f, 0x95,
-	0xa5, 0x04, 0x3b, 0x63, 0x79, 0x29, 0x8b, 0x7b, 0x6e, 0x79, 0x29, 0xd7, 0x6c, 0xa3, 0x7d, 0x84,
+	0xa3, 0xb5, 0x30, 0xa1, 0xc3, 0x43, 0x84, 0x3f, 0x07, 0x39, 0xdc, 0xa7, 0xf8, 0x78, 0x99, 0x81,
-	0xad, 0x78, 0xc5, 0xdc, 0x5f, 0xed, 0xee, 0x8b, 0xe2, 0xe9, 0xab, 0xba, 0x8b, 0x31, 0x4d, 0x20,
+	0xcb, 0xf6, 0xae, 0xb2, 0xb7, 0x40, 0xbb, 0x7b, 0xc1, 0xef, 0xae, 0x20, 0x95, 0x60, 0x69, 0x2d,
-	0x1b, 0xca, 0xea, 0x60, 0xa5, 0x1b, 0xe0, 0x4a, 0x75, 0x0f, 0xd7, 0x03, 0x85, 0x31, 0x6b, 0x68,
+	0x4f, 0x65, 0x71, 0xd1, 0x2e, 0x4f, 0xe5, 0x92, 0x75, 0x78, 0x88, 0xb0, 0x15, 0xef, 0xb8, 0x83,
-	0x1f, 0xe1, 0x23, 0xc8, 0xf2, 0xff, 0x0d, 0x5e, 0xaa, 0xaa, 0xe4, 0xdf, 0xeb, 0xa6, 0x11, 0xb5,
+	0x15, 0x1f, 0x61, 0xe1, 0x4f, 0x5f, 0x55, 0x5d, 0xb4, 0xe9, 0x09, 0xe4, 0x93, 0x8f, 0x30, 0x5e,
-	0x8e, 0xcf, 0x2e, 0xd5, 0xd4, 0x5f, 0x97, 0x6a, 0xea, 0xfb, 0xa9, 0x8a, 0xce, 0xa6, 0x2a, 0xfa,
+	0xa9, 0xf4, 0x73, 0x2f, 0xbc, 0x72, 0xbc, 0x1e, 0x48, 0xb8, 0x1e, 0x43, 0x36, 0x64, 0xf4, 0xd1,
-	0x73, 0xaa, 0xa2, 0xbf, 0xa7, 0x2a, 0x3a, 0xfe, 0x60, 0xd3, 0x2f, 0xed, 0xf7, 0x84, 0xd9, 0x95,
+	0x4a, 0x8f, 0xcf, 0x5c, 0x61, 0x8f, 0xd7, 0x03, 0x85, 0x3e, 0xf7, 0xd1, 0x21, 0xc2, 0xa7, 0x90,
-	0x79, 0xac, 0x83, 0x7f, 0x03, 0x00, 0x00, 0xff, 0xff, 0x26, 0x49, 0x54, 0x8e, 0xb4, 0x0b, 0x00,
+	0xe5, 0x23, 0x8b, 0x97, 0x12, 0x3a, 0x39, 0xd9, 0x57, 0xb1, 0xa3, 0xf9, 0xe8, 0xe2, 0xb9, 0x9a,
-	0x00,
+	0xfa, 0xeb, 0xb9, 0x9a, 0xfa, 0x6e, 0xa2, 0xa2, 0x8b, 0x89, 0x8a, 0xfe, 0x98, 0xa8, 0xe8, 0x9f,
+	0x89, 0x8a, 0x1e, 0xbd, 0xb7, 0xe9, 0x7f, 0x19, 0xef, 0x08, 0xb1, 0x23, 0x73, 0x5f, 0x47, 0xff,
+	0x05, 0x00, 0x00, 0xff, 0xff, 0x07, 0xb9, 0xbc, 0xaf, 0xb0, 0x0c, 0x00, 0x00,
 }

api/services/content/v1/content.proto

@@ -32,13 +32,16 @@ service Content {
 	// The requested data may be returned in one or more messages.
 	rpc Read(ReadContentRequest) returns (stream ReadContentResponse);
 
-	// Status returns the status of ongoing object ingestions, started via
+	// Status returns the status for a single reference.
+	rpc Status(StatusRequest) returns (StatusResponse);
+
+	// ListStatuses returns the status of ongoing object ingestions, started via
 	// Write.
 	//
 	// Only those matching the regular expression will be provided in the
 	// response. If the provided regular expression is empty, all ingestions
 	// will be provided.
-	rpc Status(StatusRequest) returns (StatusResponse);
+	rpc ListStatuses(ListStatusesRequest) returns (ListStatusesResponse);
 
 	// Write begins or resumes writes to a resource identified by a unique ref.
 	// Only one active stream may exist at a time for each ref.
@@ -124,11 +127,21 @@ message Status {
 	string expected = 6 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false];
 }
 
+
 message StatusRequest {
-	string filter = 1;
+	string ref = 1;
 }
 
 message StatusResponse {
+	Status status = 1;
+}
+
+
+message ListStatusesRequest {
+	string filter = 1;
+}
+
+message ListStatusesResponse {
 	repeated Status statuses = 1 [(gogoproto.nullable) = false];
 }
 

cmd/dist/active.go

@@ -40,7 +40,7 @@ var activeCommand = cli.Command{
 			return err
 		}
 
-		active, err := cs.Status(ctx, match)
+		active, err := cs.ListStatuses(ctx, match)
 		if err != nil {
 			return err
 		}

cmd/dist/fetch.go

@@ -123,7 +123,7 @@ outer:
 
 			activeSeen := map[string]struct{}{}
 			if !done {
-				active, err := cs.Status(ctx, "")
+				active, err := cs.ListStatuses(ctx, "")
 				if err != nil {
 					log.G(ctx).WithError(err).Error("active check failed")
 					continue

content/content.go

@@ -58,19 +58,19 @@ type Manager interface {
 
 	// Delete removes the content from the store.
 	Delete(ctx context.Context, dgst digest.Digest) error
+}
 
-	// Status returns the status of any active ingestions whose ref match the
+// IngestManager provides methods for managing ingests.
+type IngestManager interface {
+	// Status returns the status of the provided ref.
+	Status(ctx context.Context, ref string) (Status, error)
+
+	// ListStatuses returns the status of any active ingestions whose ref match the
 	// provided regular expression. If empty, all active ingestions will be
 	// returned.
-	//
+	ListStatuses(ctx context.Context, ref string) ([]Status, error)
-	// TODO(stevvooe): Status may be slighly out of place here. If this remains
-	// here, we should remove Manager and just define these on store.
-	Status(ctx context.Context, re string) ([]Status, error)
 
 	// Abort completely cancels the ingest operation targeted by ref.
-	//
-	// TODO(stevvooe): Same consideration as above. This should really be
-	// restricted to an ingest management interface.
 	Abort(ctx context.Context, ref string) error
 }
 
@@ -86,6 +86,7 @@ type Writer interface {
 // are commonly provided by complete implementations.
 type Store interface {
 	Manager
-	Ingester
 	Provider
+	IngestManager
+	Ingester
 }

content/content_test.go

@@ -52,7 +52,7 @@ func TestContentWriter(t *testing.T) {
 	}
 
 	// we should also see this as an active ingestion
-	ingestions, err := cs.Status(ctx, "")
+	ingestions, err := cs.ListStatuses(ctx, "")
 	if err != nil {
 		t.Fatal(err)
 	}

content/store.go

@@ -136,7 +136,11 @@ func (cs *store) Walk(ctx context.Context, fn WalkFunc) error {
 	})
 }
 
-func (s *store) Status(ctx context.Context, re string) ([]Status, error) {
+func (s *store) Status(ctx context.Context, ref string) (Status, error) {
+	return s.status(s.ingestRoot(ref))
+}
+
+func (s *store) ListStatuses(ctx context.Context, re string) ([]Status, error) {
 	fp, err := os.Open(filepath.Join(s.root, "ingest"))
 	if err != nil {
 		return nil, err

metadata/buckets.go

@@ -34,7 +34,9 @@ var (
 	bucketKeyObjectImages     = []byte("images")     // stores image objects
 	bucketKeyObjectContainers = []byte("containers") // stores container objects
 	bucketKeyObjectSnapshots  = []byte("snapshots")  // stores snapshot references
-	bucketKeyObjectContent    = []byte("content")    // stores content links
+	bucketKeyObjectContent    = []byte("content")    // stores content references
+	bucketKeyObjectBlob       = []byte("blob")       // stores content links
+	bucketKeyObjectIngest     = []byte("ingest")     // stores content links
 
 	bucketKeyDigest    = []byte("digest")
 	bucketKeyMediaType = []byte("mediatype")
@@ -142,18 +144,30 @@ func getSnapshotterBucket(tx *bolt.Tx, namespace, snapshotter string) *bolt.Buck
 	return getBucket(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectSnapshots, []byte(snapshotter))
 }
 
-func createContentBucket(tx *bolt.Tx, namespace string, dgst digest.Digest) (*bolt.Bucket, error) {
+func createBlobBucket(tx *bolt.Tx, namespace string, dgst digest.Digest) (*bolt.Bucket, error) {
-	bkt, err := createBucketIfNotExists(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectContent, []byte(dgst.String()))
+	bkt, err := createBucketIfNotExists(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectContent, bucketKeyObjectBlob, []byte(dgst.String()))
 	if err != nil {
 		return nil, err
 	}
 	return bkt, nil
 }
 
-func getAllContentBucket(tx *bolt.Tx, namespace string) *bolt.Bucket {
+func getBlobsBucket(tx *bolt.Tx, namespace string) *bolt.Bucket {
-	return getBucket(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectContent)
+	return getBucket(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectContent, bucketKeyObjectBlob)
 }
 
-func getContentBucket(tx *bolt.Tx, namespace string, dgst digest.Digest) *bolt.Bucket {
+func getBlobBucket(tx *bolt.Tx, namespace string, dgst digest.Digest) *bolt.Bucket {
-	return getBucket(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectContent, []byte(dgst.String()))
+	return getBucket(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectContent, bucketKeyObjectBlob, []byte(dgst.String()))
+}
+
+func createIngestBucket(tx *bolt.Tx, namespace string) (*bolt.Bucket, error) {
+	bkt, err := createBucketIfNotExists(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectContent, bucketKeyObjectIngest)
+	if err != nil {
+		return nil, err
+	}
+	return bkt, nil
+}
+
+func getIngestBucket(tx *bolt.Tx, namespace string) *bolt.Bucket {
+	return getBucket(tx, bucketKeyVersion, []byte(namespace), bucketKeyObjectContent, bucketKeyObjectIngest)
 }

metadata/content.go

@@ -4,11 +4,14 @@ import (
 	"context"
 	"encoding/binary"
 	"io"
+	"regexp"
 
 	"github.com/boltdb/bolt"
 	"github.com/containerd/containerd/content"
+	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/namespaces"
 	digest "github.com/opencontainers/go-digest"
+	"github.com/pkg/errors"
 )
 
 type contentStore struct {
@@ -33,9 +36,9 @@ func (cs *contentStore) Info(ctx context.Context, dgst digest.Digest) (content.I
 
 	var info content.Info
 	if err := view(ctx, cs.db, func(tx *bolt.Tx) error {
-		bkt := getContentBucket(tx, ns, dgst)
+		bkt := getBlobBucket(tx, ns, dgst)
 		if bkt == nil {
-			return content.ErrNotFound("")
+			return errors.Wrapf(errdefs.ErrNotFound, "content digest %v", dgst)
 		}
 
 		info.Digest = dgst
@@ -56,7 +59,7 @@ func (cs *contentStore) Walk(ctx context.Context, fn content.WalkFunc) error {
 	// TODO: Batch results to keep from reading all info into memory
 	var infos []content.Info
 	if err := view(ctx, cs.db, func(tx *bolt.Tx) error {
-		bkt := getAllContentBucket(tx, ns)
+		bkt := getBlobsBucket(tx, ns)
 		if bkt == nil {
 			return nil
 		}
@@ -95,37 +98,121 @@ func (cs *contentStore) Delete(ctx context.Context, dgst digest.Digest) error {
 	}
 
 	return update(ctx, cs.db, func(tx *bolt.Tx) error {
-		bkt := getContentBucket(tx, ns, dgst)
+		bkt := getBlobBucket(tx, ns, dgst)
 		if bkt == nil {
-			return content.ErrNotFound("")
+			return errors.Wrapf(errdefs.ErrNotFound, "content digest %v", dgst)
 		}
 
 		// Just remove local reference, garbage collector is responsible for
 		// cleaning up on disk content
-		return getAllContentBucket(tx, ns).Delete([]byte(dgst.String()))
+		return getBlobsBucket(tx, ns).Delete([]byte(dgst.String()))
 	})
 }
 
-func (cs *contentStore) Status(ctx context.Context, re string) ([]content.Status, error) {
+func (cs *contentStore) ListStatuses(ctx context.Context, re string) ([]content.Status, error) {
-	_, err := namespaces.NamespaceRequired(ctx)
+	ns, err := namespaces.NamespaceRequired(ctx)
 	if err != nil {
 		return nil, err
 	}
 
-	// TODO: Read status keys and match
+	var rec *regexp.Regexp
+	if re != "" {
+		rec, err = regexp.Compile(re)
+		if err != nil {
+			return nil, err
+		}
+	}
 
-	return cs.Store.Status(ctx, re)
+	var brefs []string
+	if err := view(ctx, cs.db, func(tx *bolt.Tx) error {
+		bkt := getIngestBucket(tx, ns)
+		if bkt == nil {
+			return nil
+		}
+
+		return bkt.ForEach(func(k, v []byte) error {
+			if rec == nil || rec.Match(k) {
+				brefs = append(brefs, string(v))
+			}
+			return nil
+		})
+	}); err != nil {
+		return nil, err
+	}
+
+	statuses := make([]content.Status, 0, len(brefs))
+	for _, bref := range brefs {
+		status, err := cs.Store.Status(ctx, bref)
+		if err != nil {
+			if errdefs.IsNotFound(err) {
+				continue
+			}
+			return nil, err
+		}
+		status.Ref = trimKey(status.Ref)
+
+		statuses = append(statuses, status)
+	}
+
+	return statuses, nil
+
+}
+
+func getRef(tx *bolt.Tx, ns, ref string) string {
+	bkt := getIngestBucket(tx, ns)
+	if bkt == nil {
+		return ""
+	}
+	v := bkt.Get([]byte(ref))
+	if len(v) == 0 {
+		return ""
+	}
+	return string(v)
+}
+
+func (cs *contentStore) Status(ctx context.Context, ref string) (content.Status, error) {
+	ns, err := namespaces.NamespaceRequired(ctx)
+	if err != nil {
+		return content.Status{}, err
+	}
+
+	var bref string
+	if err := view(ctx, cs.db, func(tx *bolt.Tx) error {
+		bref = getRef(tx, ns, ref)
+		if bref == "" {
+			return errors.Wrapf(errdefs.ErrNotFound, "reference %v", ref)
+		}
+
+		return nil
+	}); err != nil {
+		return content.Status{}, err
+	}
+
+	return cs.Store.Status(ctx, bref)
 }
 
 func (cs *contentStore) Abort(ctx context.Context, ref string) error {
-	_, err := namespaces.NamespaceRequired(ctx)
+	ns, err := namespaces.NamespaceRequired(ctx)
 	if err != nil {
 		return err
 	}
 
-	// TODO: Read status key and delete
+	return update(ctx, cs.db, func(tx *bolt.Tx) error {
+		bkt := getIngestBucket(tx, ns)
+		if bkt == nil {
+			return errors.Wrapf(errdefs.ErrNotFound, "reference %v", ref)
+		}
+		bref := string(bkt.Get([]byte(ref)))
+		if bref == "" {
+			return errors.Wrapf(errdefs.ErrNotFound, "reference %v", ref)
+		}
+		if err := bkt.Delete([]byte(ref)); err != nil {
+			return err
+		}
+
+		return cs.Store.Abort(ctx, bref)
+	})
 
-	return cs.Store.Abort(ctx, ref)
 }
 
 func (cs *contentStore) Writer(ctx context.Context, ref string, size int64, expected digest.Digest) (content.Writer, error) {
@@ -134,18 +221,32 @@ func (cs *contentStore) Writer(ctx context.Context, ref string, size int64, expe
 		return nil, err
 	}
 
-	// TODO: Create ref key
+	var w content.Writer
-
+	if err := update(ctx, cs.db, func(tx *bolt.Tx) error {
 		if expected != "" {
-		if err := view(ctx, cs.db, func(tx *bolt.Tx) error {
+			cbkt := getBlobBucket(tx, ns, expected)
-			bkt := getContentBucket(tx, ns, expected)
+			if cbkt != nil {
-			if bkt != nil {
+				return errors.Wrapf(errdefs.ErrAlreadyExists, "content %v", expected)
-				return content.ErrExists("")
 			}
-			return nil
-		}); err != nil {
-			return nil, err
 		}
+
+		bkt, err := createIngestBucket(tx, ns)
+		if err != nil {
+			return err
+		}
+
+		if len(bkt.Get([]byte(ref))) > 0 {
+			return errors.Wrapf(errdefs.ErrUnavailable, "ref %v is currently in use", ref)
+		}
+
+		sid, err := bkt.NextSequence()
+		if err != nil {
+			return err
+		}
+
+		bref := createKey(sid, ns, ref)
+		if err := bkt.Put([]byte(ref), []byte(bref)); err != nil {
+			return err
 		}
 
 		// Do not use the passed in expected value here since it was
@@ -155,8 +256,9 @@ func (cs *contentStore) Writer(ctx context.Context, ref string, size int64, expe
 		// to allow content which exists in content store but not
 		// namespace to be linked here and returned an exist error, but
 		// this would require more configuration to make secure.
-	w, err := cs.Store.Writer(ctx, ref, size, "")
+		w, err = cs.Store.Writer(ctx, bref, size, "")
-	if err != nil {
+		return err
+	}); err != nil {
 		return nil, err
 	}
 
@@ -164,6 +266,7 @@ func (cs *contentStore) Writer(ctx context.Context, ref string, size int64, expe
 	// when no expected is provided there.
 	return &namespacedWriter{
 		Writer:    w,
+		ref:       ref,
 		namespace: ns,
 		db:        cs.db,
 	}, nil
@@ -171,22 +274,21 @@ func (cs *contentStore) Writer(ctx context.Context, ref string, size int64, expe
 
 type namespacedWriter struct {
 	content.Writer
+	ref       string
 	namespace string
 	db        *bolt.DB
 }
 
 func (nw *namespacedWriter) Commit(size int64, expected digest.Digest) error {
-	tx, err := nw.db.Begin(true)
+	return nw.db.Update(func(tx *bolt.Tx) error {
-	if err != nil {
+		bkt := getIngestBucket(tx, nw.namespace)
+		if bkt != nil {
+			if err := bkt.Delete([]byte(nw.ref)); err != nil {
 				return err
 			}
-
-	if err := nw.commit(tx, size, expected); err != nil {
-		tx.Rollback()
-		return err
 		}
-
+		return nw.commit(tx, size, expected)
-	return tx.Commit()
+	})
 }
 
 func (nw *namespacedWriter) commit(tx *bolt.Tx, size int64, expected digest.Digest) error {
@@ -196,20 +298,18 @@ func (nw *namespacedWriter) commit(tx *bolt.Tx, size int64, expected digest.Dige
 	}
 	actual := nw.Writer.Digest()
 
-	// TODO: Handle already exists
 	if err := nw.Writer.Commit(size, expected); err != nil {
-		if !content.IsExists(err) {
+		if !errdefs.IsAlreadyExists(err) {
 			return err
 		}
-		if getContentBucket(tx, nw.namespace, actual) != nil {
+		if getBlobBucket(tx, nw.namespace, actual) != nil {
-			return content.ErrExists("")
+			return errors.Wrapf(errdefs.ErrAlreadyExists, "content %v", actual)
 		}
-		// Link into this namespace
 	}
 
 	size = status.Total
 
-	bkt, err := createContentBucket(tx, nw.namespace, actual)
+	bkt, err := createBlobBucket(tx, nw.namespace, actual)
 	if err != nil {
 		return err
 	}
@@ -257,9 +357,9 @@ func (cs *contentStore) checkAccess(ctx context.Context, dgst digest.Digest) err
 	}
 
 	return view(ctx, cs.db, func(tx *bolt.Tx) error {
-		bkt := getContentBucket(tx, ns, dgst)
+		bkt := getBlobBucket(tx, ns, dgst)
 		if bkt == nil {
-			return content.ErrNotFound("")
+			return errors.Wrapf(errdefs.ErrNotFound, "content digest %v", dgst)
 		}
 		return nil
 	})

metadata/snapshot.go

@@ -29,11 +29,11 @@ func NewSnapshotter(db *bolt.DB, name string, sn snapshot.Snapshotter) snapshot.
 	}
 }
 
-func snapshotKey(id uint64, namespace, key string) string {
+func createKey(id uint64, namespace, key string) string {
 	return fmt.Sprintf("%s/%d/%s", namespace, id, key)
 }
 
-func trimName(key string) string {
+func trimKey(key string) string {
 	parts := strings.SplitN(key, "/", 3)
 	if len(parts) < 3 {
 		return ""
@@ -82,9 +82,9 @@ func (s *snapshotter) Stat(ctx context.Context, key string) (snapshot.Info, erro
 	if err != nil {
 		return snapshot.Info{}, err
 	}
-	info.Name = trimName(info.Name)
+	info.Name = trimKey(info.Name)
 	if info.Parent != "" {
-		info.Parent = trimName(info.Parent)
+		info.Parent = trimKey(info.Parent)
 	}
 
 	return info, nil
@@ -143,7 +143,7 @@ func (s *snapshotter) createSnapshot(ctx context.Context, key, parent string, re
 		if err != nil {
 			return err
 		}
-		bkey = snapshotKey(sid, ns, key)
+		bkey = createKey(sid, ns, key)
 		if err := bkt.Put([]byte(key), []byte(bkey)); err != nil {
 			return err
 		}
@@ -188,7 +188,7 @@ func (s *snapshotter) Commit(ctx context.Context, name, key string) error {
 		if err != nil {
 			return err
 		}
-		nameKey = snapshotKey(sid, ns, name)
+		nameKey = createKey(sid, ns, name)
 		if err := bkt.Put([]byte(name), []byte(nameKey)); err != nil {
 			return err
 		}
@@ -259,9 +259,9 @@ func (s *snapshotter) Walk(ctx context.Context, fn func(context.Context, snapsho
 			return err
 		}
 
-		info.Name = trimName(info.Name)
+		info.Name = trimKey(info.Name)
 		if info.Parent != "" {
-			info.Parent = trimName(info.Parent)
+			info.Parent = trimKey(info.Parent)
 		}
 		if err := fn(ctx, info); err != nil {
 			return err

services/content/service.go

@@ -224,12 +224,31 @@ func (rw *readResponseWriter) Write(p []byte) (n int, err error) {
 }
 
 func (s *Service) Status(ctx context.Context, req *api.StatusRequest) (*api.StatusResponse, error) {
-	statuses, err := s.store.Status(ctx, req.Filter)
+	status, err := s.store.Status(ctx, req.Ref)
+	if err != nil {
+		return nil, errdefs.ToGRPCf(err, "could not get status for ref %q", req.Ref)
+	}
+
+	var resp api.StatusResponse
+	resp.Status = &api.Status{
+		StartedAt: status.StartedAt,
+		UpdatedAt: status.UpdatedAt,
+		Ref:       status.Ref,
+		Offset:    status.Offset,
+		Total:     status.Total,
+		Expected:  status.Expected,
+	}
+
+	return &resp, nil
+}
+
+func (s *Service) ListStatuses(ctx context.Context, req *api.ListStatusesRequest) (*api.ListStatusesResponse, error) {
+	statuses, err := s.store.ListStatuses(ctx, req.Filter)
 	if err != nil {
 		return nil, errdefs.ToGRPCf(err, "could not get status for filter %q", req.Filter)
 	}
 
-	var resp api.StatusResponse
+	var resp api.ListStatusesResponse
 	for _, status := range statuses {
 		resp.Statuses = append(resp.Statuses, api.Status{
 			StartedAt: status.StartedAt,

services/content/store.go

@@ -94,8 +94,27 @@ func (rs *remoteStore) ReaderAt(ctx context.Context, dgst digest.Digest) (io.Rea
 	}, nil
 }
 
-func (rs *remoteStore) Status(ctx context.Context, filter string) ([]content.Status, error) {
+func (rs *remoteStore) Status(ctx context.Context, ref string) (content.Status, error) {
 	resp, err := rs.client.Status(ctx, &contentapi.StatusRequest{
+		Ref: ref,
+	})
+	if err != nil {
+		return content.Status{}, errdefs.FromGRPC(err)
+	}
+
+	status := resp.Status
+	return content.Status{
+		Ref:       status.Ref,
+		StartedAt: status.StartedAt,
+		UpdatedAt: status.UpdatedAt,
+		Offset:    status.Offset,
+		Total:     status.Total,
+		Expected:  status.Expected,
+	}, nil
+}
+
+func (rs *remoteStore) ListStatuses(ctx context.Context, filter string) ([]content.Status, error) {
+	resp, err := rs.client.ListStatuses(ctx, &contentapi.ListStatusesRequest{
 		Filter: filter,
 	})
 	if err != nil {